path: root/samples
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authorJacob Shin <jacob.shin@amd.com>2013-02-06 11:26:29 -0600
committerIngo Molnar <mingo@kernel.org>2013-02-16 09:37:27 +0100
commite259514eef764a5286873618e34c560ecb6cff13 (patch)
tree2ab5514cd2390f2392d8b55988c62ebe0163317d /samples
parent6a71e69f78fbcb453f4444a8288ea8b7cdc7cea4 (diff)
perf/x86/amd: Enable northbridge performance counters on AMD family 15h
On AMD family 15h processors, there are 4 new performance counters (in addition to 6 core performance counters) that can be used for counting northbridge events (i.e. DRAM accesses). Their bit fields are almost identical to the core performance counters. However, unlike the core performance counters, these MSRs are shared between multiple cores (that share the same northbridge). We will reuse the same code path as existing family 10h northbridge event constraints handler logic to enforce this sharing. Signed-off-by: Jacob Shin <jacob.shin@amd.com> Acked-by: Stephane Eranian <eranian@google.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Jacob Shin <jacob.shin@amd.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1360171589-6381-7-git-send-email-jacob.shin@amd.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
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